[PATCH 1/7] iio: amplifiers: ad8366: reject devices without match data

[Jiale Yao <yaojiale02@163.com>]

A device bound through driver_override need not match an entry in the
driver tables. In that case spi_get_device_match_data() returns NULL,
but ad8366_probe() later dereferences the result while setting up the
IIO device.

Reject devices without match data before using the chip information.

Fixes: d5e02d0d00b9 ("iio: amplifiers: ad8366: add device tree support")
Signed-off-by: Jiale Yao <yaojiale02@163.com>
---
 drivers/iio/amplifiers/ad8366.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iio/amplifiers/ad8366.c b/drivers/iio/amplifiers/ad8366.c
index e12f8604f59f..9adff120de1a 100644
--- a/drivers/iio/amplifiers/ad8366.c
+++ b/drivers/iio/amplifiers/ad8366.c
@@ -326,6 +326,8 @@ static int ad8366_probe(struct spi_device *spi)
 
 	st->spi = spi;
 	st->info = spi_get_device_match_data(spi);
+	if (!st->info)
+		return -ENODATA;
 
 	enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_HIGH);
 	if (IS_ERR(enable_gpio))
-- 
2.34.1